Microsoft India has officially started rolling out OTA updates to enable 4G for select Lumia devices
Microsoft India has officially started rolling out OTA updates for select Lumia smartphones in India to enable support for 4G LTE bands. The latest OTA update that enables 4G LTE update is now available on the following devices : Lumia 1520, Lumia 1320, Lumia 1020, Lumia 930, Lumia 925, Lumia 920, Lumia 830, and Lumia 625.
Users of these devices can either install the latest update through the Push Notification or go to Settings > Phone update > Check for Update to manually download it. Then go to Settings > Mobile + SIM to enable 4G.